A minute analysis (experimental) of the various movements produced by stimulating in the monkey different regions of the cortical centre for the upper limb, as defined by Professor Ferrier/ by Charles E. Beevor.
- Beevor, Charles E.
- Date:
- 1887
Licence: Public Domain Mark
Credit: A minute analysis (experimental) of the various movements produced by stimulating in the monkey different regions of the cortical centre for the upper limb, as defined by Professor Ferrier/ by Charles E. Beevor. Source: Wellcome Collection.
Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)
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![LIBRARY. VI. A Minute Analysis (Experimental) of the Various Movements produced by stimulating in the Monkey different Regions of the Cortical Centre for the Upper Limb, as defined by Professor Ferrier. By Charles E. Beevor, M.D., M.R.C.P., and Victor Horsley, B.S., F.R.C.S., F.R.S,, Brown Professor of Pathology at University College, London. Received Jane 4,—Read Jane 10, 1886. [Plate 7.] The following researoh was undertaken as a necessary preface to an investigation, which we are at present engaged upon, into the localisation of motor function in the cervical enlargement of the spinal cord. Briefly speaking, the experiments from which the following conclusions have been drawn consisted in an elaborate examination of the movements elicited by stimulating with the interrupted induced current every part of the motor cortex in the Monkey, in which the upper limb is primarily represented, as first described by Professor Ferrier. Before entering, however, on a detailed description of the present research, it will be necessary to discuss shortly the anatomical features of the parts of the cortex concerned. Anatomy.—A glance at the accompanying diagram of the external or convex surface of the left cerebral hemisphere of the Macacque Monkey shows that Ferrier's motor region is bounded inferiorly by the fissure of Sylvius, posteriorly by the intra-parietal sulcus, superiorly by the margin of the hemisphere, and anteriorly by a narrow strip of grey matter* in front of the vertical limb of the prsecentral sulcus, and also by that sulcus itself. The central point of this area is the middle third of the ascending frontal convolution, and in this portion of the cortex and around it we have the cortical centre for the movements of the opposite upper limb. Before enumerating the functions of this portion of the cortex it is incumbent upon us to draw attention to certain minute characteristics of the various sulci of this region, these being of great constancy, and therefore of primary importance in aiding exact localisation of function. * By this is meant portions of the bases of the frontal convolutions, the extent of which can be mapped out by electrical excitation. MDCCCLXXXVH.—B. X 23.11.87](https://iiif.wellcomecollection.org/image/b21274022_0005.jp2/full/800%2C/0/default.jpg)
